Saldner H O
Appl Opt. 1996 Jul 10;35(20):3791-8. doi: 10.1364/AO.35.003791.
Phase stepping between frames in TV holography is combined with sinusoidal phase modulation to determine phase and amplitude distributions of objects vibrating with small amplitudes (<λ/20, where λis the wavelength of the laser light used). This technique has applications in, for example, optical modal analysis and the determination of harmonic sound fields in air and water. The noise reduction that is obtained with the phase-stepping technique reduces the number of interferograms needed by one-half, which can shorten experimental time. The technique is robust, easy to use, and illustrated by modes of vibration in a simple plate and in a more complicated structure (a violin).
电视全息术中帧间的相位步进与正弦相位调制相结合，以确定小振幅（<λ/20，其中λ是所用激光的波长）振动物体的相位和振幅分布。例如，该技术可应用于光学模态分析以及空气和水中谐波声场的测定。通过相位步进技术获得的降噪效果将所需干涉图的数量减少了一半，这可以缩短实验时间。该技术稳健、易于使用，并通过简单平板和更复杂结构（小提琴）中的振动模式进行了说明。
